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CLONE (Mirror set)
Number of drives: at least 2
Unit capacity: size of one member.
Spares: yes
Fault tolerance: can withstand the loss of any number of drives without
losing data as long as at least one complete member remains online.
CLONE mode works the same way as RAID 1, by maintaining a
complete copy of the entire set of data on each drive.
LARGE (Spanned set)
Number of drives: at least 2
Unit capacity: 100% of all drives together regardless of differences in size
Spares: no
Fault tolerance: cannot withstand the loss of any drives without losing
data. However, some data may be recovered as long as the drive(s)
carrying the file system data (boot record, directory, etc.) remain online.
LARGE mode is neither a RAID nor is it a JBOD. It works by declaring
the sum of all available space of the member drives as a single unit,
without striping the data. As each member is filled, new data is stored on
the next.
Notes about Spare Drives
If EZ mode is disabled (SW1:2 ON), all individual drives not configured
as array members will be offered to the host adapter as separate units.
To create an array with one or more spares, set or modify the RAID
mode using fewer than 5 members, while the spares are disconnected
from the Port Multiplier. When EZ mode is enabled, individual drives
connected when an array is present are considered spare.
Spare drives must be equal to or larger in size than the smallest
member.
When any type of array is defined, individual units will be considered
spare. RAID 0 and LARGE arrays are not fault-tolerant and spare drives
will not be useful; therefore, disabling EZ for these arrays is
recommended.
When a spare drive is present and a fault-tolerant RAID (1, 10, 3, or 5) is
defined, EZ mode will automatically rebuild any available spares into the
array.
www.addonics.com
Technical Support (M-F 8:30am - 6:00pm PST)
Phone: 408-453-6212
Email: www.addonics.com/support/query/
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